<template>
  <textarea :id="tinymceId" style="visibility: hidden" />
</template>

<script>
  import loadTinymce from '@/utils/form/loadTinymce'
  import { plugins, toolbar } from './config'
  import { debounce } from 'throttle-debounce'

  let num = 1

  export default {
    props: {
      id: {
        type: String,
        default: () => {
          num === 10000 && (num = 1)
          return `tinymce${+new Date()}${num++}`
        },
      },
      value: {
        default: '',
      },
    },
    data() {
      return {
        tinymceId: this.id,
      }
    },
    mounted() {
      loadTinymce((tinymce) => {
        // eslint-disable-next-line global-require
        require('./zh_CN')
        let conf = {
          selector: `#${this.tinymceId}`,
          language: 'zh_CN',
          menubar: 'file edit insert view format table',
          plugins,
          toolbar,
          height: 300,
          branding: false,
          object_resizing: false,
          end_container_on_empty_block: true,
          powerpaste_word_import: 'clean',
          code_dialog_height: 450,
          code_dialog_width: 1000,
          advlist_bullet_styles: 'square',
          advlist_number_styles: 'default',
          default_link_target: '_blank',
          link_title: false,
          nonbreaking_force_tab: true,
        }
        conf = Object.assign(conf, this.$attrs)
        conf.init_instance_callback = (editor) => {
          if (this.value) editor.setContent(this.value)
          this.vModel(editor)
        }
        tinymce.init(conf)
      })
    },
    destroyed() {
      this.destroyTinymce()
    },
    methods: {
      vModel(editor) {
        // 控制连续写入时setContent的触发频率
        const debounceSetContent = debounce(250, editor.setContent)
        this.$watch('value', (val, prevVal) => {
          if (editor && val !== prevVal && val !== editor.getContent()) {
            if (typeof val !== 'string') val = val.toString()
            debounceSetContent.call(editor, val)
          }
        })

        editor.on('change keyup undo redo', () => {
          this.$emit('input', editor.getContent())
        })
      },
      destroyTinymce() {
        if (!window.tinymce) return
        const tinymce = window.tinymce.get(this.tinymceId)
        if (tinymce) {
          tinymce.destroy()
        }
      },
    },
  }
</script>
